Can I use fresh tomatoes instead of canned tomato sauce?
Yes. Use 1 cup fresh tomato purée or blend additional Roma tomatoes in place of the canned tomato sauce with chiles.
How much heat will this salsa have?
Medium-high heat from 4 jalapeños and 10 serrano peppers. Remove seeds and ribs for less heat, or reduce serrano count to 6–8.
Should I char the peppers and tomatoes together?
Yes, char all vegetables on a cast-iron skillet or directly over flame until blackened spots appear (3–4 minutes per batch), then blend.
How long does this salsa keep?
Store in an airtight container in the refrigerator for up to 5 days, or freeze for up to 3 months.
Can I make this salsa ahead?
Yes, prepare it 1–2 days in advance and refrigerate. Flavors deepen slightly after 12 hours.